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Novel method for designing super oleophobic surface structure

A design method, superoleophobic technology, applied in microstructure technology, microstructure device, nanostructure fabrication, etc.

Inactive Publication Date: 2011-04-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to the above two literatures, there are no more reports on super-oleophobic surfaces, which is not consistent with the reality of using a large number of oils in industry. Therefore, it is necessary to carry out research on the design and preparation of super-oleophobic surfaces.

Method used

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  • Novel method for designing super oleophobic surface structure
  • Novel method for designing super oleophobic surface structure
  • Novel method for designing super oleophobic surface structure

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1 (square column form structure, section structure is figure 1 The structural form, environmental conditions and parameters are: P-P 0 =1kPa, θ=50°, γ=0.02N / m, θ C =140°, α=30°):

[0026] According to the Laplace formula, the curved surface radius of the liquid 1 inside the solid microstructure 3 is calculated, and the curved surface radius is: r=2γ / (P-P 0 )=2×0.02 / 1000=40 μm. Calculate the maximum period of the solid microstructure 3 according to the radius of the curved surface, and the maximum period of the microstructure is L max = 113 μm. At the same time, the protrusion ratio of the structure is calculated according to the Cassie calculation formula. f=(cosθ C +1) / (cosθ+1)=0.1424, ξ = f = 0.3774 .

[0027] Select the solid microstructure 3 whose structural period is L=1 μm, calculate the angle β formed between the interface formed by liquid 1 and air 2 and the vertical wall o...

Embodiment 2

[0029] Embodiment 2 (square column form structure, section structure is figure 2 The structural form, environmental conditions and parameters are: P-P 0 =10kPa, θ=50°, γ=0.02N / m, θ C =140°):

[0030] Calculate the curved surface radius of the liquid surface of the liquid 1 in the solid microstructure 3 according to the Laplace formula, and the curved surface radius is: r=2γ / (P-P 0 )=2×0.02 / 1000=4 μm. Then calculate the maximum period of the structure according to the radius of the surface, and the maximum period of the structure is L max = 11.3 μm. At the same time, the protrusion ratio of the structure is calculated according to the Cassie calculation formula. f=(cosθ C +1) / (cosθ+1)=0.1424, ξ = f = 0.3774 .

[0031] Select a microstructure whose structural period is L=1 μm, and calculate the angle β formed between the interface formed by liquid 1 and air 2 and the wall of solid microstructure 3, β...

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Abstract

The invention discloses a method for designing a super oleophobic surface structure and relates to the technical field of design and preparation of functional surfaces of micronano structures. The method comprises the following steps of: calculating the radius of the curved surface of the liquid-vapor interface according to the pressure intensity born by the work of the super oleophobic surface and the pressure intensity difference among gases (the pressure intensity difference of the liquid-vapor interface); determining the longest period of the micro structure according to the radius of the curved surface; determining the protuberant ratio of the structure according to the super oleophobic requirement; and finally, carrying out textual research on the contact state of oil liquid and the surface of the structure according to the structural form of the super oleophobic surface and the designed structural parameters (period to the protuberant ratio) and ensuring that the oil liquid is in a Cassie contact state. By using the geometrical analysis method, the special microstructure form and parameters are analyzed so as to realize the super oleophobic performance of the surface and the direct controllable design of the super oleophobic surface.

Description

technical field [0001] The invention relates to the technical field of micro-nano structure functional surface design and preparation, in particular to a surface structure design method for designing a new structure to achieve super-oleophobic properties on the surface, which is suitable for anti-oil adhesion and drag reduction of oil pipelines or other oily fluids Design analysis of the microstructure of superhydrophobic surfaces used in the field. Background technique [0002] In the past decade, the research on superhydrophobic surfaces has received enough attention. Since there are a large number of natural super-hydrophobic surfaces in the biological world, researchers have performed biomimetic fabrication of these natural super-hydrophobic surfaces to achieve super-hydrophobic properties on a large number of surfaces. So far, researchers have been able to prepare relatively stable super-hydrophobic surfaces. For example, the Jiang Lei research group of the Chinese Aca...

Claims

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Application Information

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IPC IPC(8): B81C99/00B82B3/00
Inventor 周明李健蔡兰李保家
Owner JIANGSU UNIV
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